Every mind, whether feeble or strong, possesses a root of corruption. A root that takes pleasure in the wrong and unjustified. What makes each root unique, though, is the trigger. It could range from a minuscule event to one of great stress and concentration. Unfortunately, one pony's particular trigger was set off with the use of particularly dark and chaotic magic. Magic that undoubtedly would bring about a conclusion to her story...characters and all.

(Picture belongs to TurboSolid. Also, thanks to Electric Bass for help on a few things.)